A Novel Manufacturing Process for Glass THGEMs and First Characterisation in an Optical Gaseous Argon TPC

Lowe, Adam, Majumdar, Krishanu ORCID: 0000-0003-3473-2376, Mavrokoridis, Konstantinos ORCID: 0000-0002-9244-4519, Philippou, Barney, Roberts, Adam and Touramanis, Christos ORCID: 0000-0001-5191-2171 (2021) A Novel Manufacturing Process for Glass THGEMs and First Characterisation in an Optical Gaseous Argon TPC. APPLIED SCIENCES-BASEL, 11 (20). p. 9450.

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Official URL: http://dx.doi.org/10.3390/app11209450

Abstract

This paper details a novel, patent pending, abrasive machining manufacturing process for the formation of sub-millimetre holes in THGEMs, with the intended application in gaseous and dual-phase TPCs. Abrasive machining favours a non-ductile substrate such as glasses or ceramics. This innovative manufacturing process allows for unprecedented versatility in THGEM substrates, electrodes, and hole geometry and pattern. Consequently, THGEMs produced via abrasive machining can be tailored for specific properties, for example: high stiffness, low total thickness variation, radiopurity, moisture absorption/outgassing and/or carbonisation resistance. This paper specifically focuses on three glass substrate THGEMs (G-THGEMs) made from Schott Borofloat 33 and Fused Silica. Circular and hexagonal hole shapes are also investigated. The G-THGEM electrodes are made from Indium Tin Oxide (ITO), with a resistivity of 150 $\Omega$/Sq. All G-THGEMs were characterised in an optical (EMCCD) readout GArTPC, and compared to a traditionally manufactured FR4 THGEM, with their charging and secondary scintillation (S2) light production behaviour analysed.

Item Type:	Article
Uncontrolled Keywords:	glass thick gaseous electron multipliers (G-THGEMs), thick gaseous electron multipliers (THGEM), large electron multiplier (LEM), micropattern gaseous detectors, time projection chambers (TPC), noble liquid detectors, photon detectors for UV, visible and IR photons (solid-state)
Divisions:	Faculty of Science and Engineering > School of Physical Sciences
Depositing User:	Symplectic Admin
Date Deposited:	13 Dec 2021 15:34
Last Modified:	15 Mar 2024 04:31
DOI:	10.3390/app11209450
Open Access URL:	https://www.mdpi.com/2076-3417/11/20/9450
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3145294